Patents by Inventor Ruth H. Hipp

Ruth H. Hipp has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Inhibiting polymerization of ethylenically unsaturated monomers
    Patent number: 4692544
    Abstract: Certain substituted diaryl amines are used to inhibit the polymerization of ethylenically unsaturated monomers; for example, unsaturated carboxylic acids and derivatives thereof.
    Type: Grant
    Filed: August 23, 1985
    Date of Patent: September 8, 1987
    Assignee: Sandoz Ltd.
    Inventors: Richard N. Goerner, J. Michael Hipp, Ruth H. Hipp